Coved pivoted hammer



M. F. WILLIAMS.

GOVED PIVOTED HAMMER.

APPLICATION FILED FEB,25,1922.

jmg mgfi, PatentedAug. a, 1922.

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application filed February 25, W22. serial do. 5%,083.

To all whom it may concern Be it known that I, MILTON l mums, a citizenof the United States, residing at St. Louis, in the State of Missouri,have invented certain new and useful Improvements in Coved PivotedHammers, of which the following is a specification. a

This invention relates to certain new and useful improvements in covedpivoted hammers, the peculiarities of which will be hereinafter fullydescribed and claimed.

The main object of my invention is the provision of a coved pivotedhammer, preferably of the the stirrup kind, having a cutting edgewmbined with a curved deflecting surface adapted to throw the materialbeing reduced forward and outward again into the path of the hammer, sothat the large particles are again subject to reduction beform of crossbar tion of rotation of tween the cage and the said cutting edge, whilethe finer particles pass out t rough the cage; secondly,.to provide anadjustablecutting edge in connection with said deflecting surface;thirdly to provide an adjustable reversible plate, adapted to form acutting edge and deflecting surface in either position; and rourthly, toprovide an adjustable cutter-bars in the-cover adapted to co-opcratewith said coved pivoted hammer.

In the-accompanying drawing on which like reference letter indicatecorresponding parts, Fig. i represents a vertical sectional elevationacross the rotor shaft of a machine exemplifying my invention,thesection being taken just inside the side housing of the machine; Fig. 2,an enlarged detail face view of my coved pivoted hammer in the stirruphead and spaced shanks; across section on the lineEZ-Q or Fig. t, asimilar detail face view of my adjustale cutter bar in the cover; andFig. 5, an end view of the same. Y

The letter A designates a rotor shaft mounted in a casing l3 having ahopper G with regulating slide D, and breaker plate E. The shaft A isprovided with discs F having rods G on which are pivotally mountedshanks H of pivoted hammers by means of holes at th ir inner ends,saidrods being eccentric and parallel to the shaft A.

Fig. 3,

The outer ends ofthe shanks are connected by a cross bar head '1 whichis concavely curved at the front-with regard to the directhe hammers asindicated by the hammer circle Fig. 1, and with the outer edge of saidhead locatedsubstantially in the radial lane R through the plvotal axisX of the hammers and center of the shaft d, and the inner edge locatednearer the plvotal axis and forward of said plane R so that the saidhead is inclined with the concave towards the front. The shanks H arespaced apart substantially the'width of the casing B and on the head isadjustably mounted a similarly curved plate d, preferably curvedcylindrically and somewhat more than a halt circle, having its lateraledges K K beveled or otherwise sharpened. One edge, K for instance Fig.3, is located substantially in radial plane R when in operation andfurthest from the pivotal axis, to formthe operative cutting edge. Theother edge, K for instance, is located in front of the radial plane Rand is bent so much further outward radially than a portion of theconnecting intermediate surface of said plate that is nearer to thepivotal axis than the forward edge K,

that this forward projecting edge gives an outward flip to the largerparticles of the material being reduced after being deflected upward andinward and outward again over the forward edge K, and'against the cage Lconcentric with the rotor shaft, as indicated in Fig. 1. The linerparticles pass out through said openings in cage. The larger particlesare again subject to reduction by the cutting edge K in connection withthe cage till they are fine enough to. pass through the cage.

The forward side edge K extends so much further outward radially fromthe pivot axis than the intermediate portion of the deep cove betweenthe lateral edges, that the forward edge give a decided flip outward tothe material deflected from the cutting edge around the cove plate tothe said forward edge K. This forward edge likewise serves to guard thedeep cove between the lateral edges, from the surplus material notpassing under the forward edge to be acted on the cut ting edge'K asdescribed. The surplus material therefore passes over the cross bar headto be engaged by the following hammer and either driven around dicatedby the arrows in assing inward over the cross bar head to a followingher or hammers. j

The plate I is preferably reversible so that either the edge or K may belocated subin the deep cove as in Fig. 1, or again specification ofLetters Patent. P$Lt@m$@fl A 1 319%% Mill stantiall in the radial planeR, and the the said head and 'cage. edge with regard to the cage is thusobtainother ge become the forward edge over which is deflected thecoarser articles before mentioned. Any suitab e fastening means may beused to connect'the said plate adjustablj; to the head I, such as boltsM passing t rough holes in the center line of the plate and throhtransverse slots 0 in aving nuts P on their outer ends to hold theplate in any adjusted osition or reversed position on-said head.

n account of the curved shape of the plate,

the outer cutting edge when adjusted later- I ally as indicated bydashed lines in F i 3, will project slightly in front of the p ane R,and a further radial distance from the pivotal axisxof the hammer andtherefore closerto the inner surfaceof the cage, when adjusted laterallyoutward as indicated in Fig. 3. Under the reaction of the coarserparticles of the material being deflected, the outer cutting edge willnormally recede so that it lies substantially in the radial plane R whenoperating, and further backward movement will cause it to recede fromthe A close adjustment of the operative able.

forward portions of the materlal being reduced, and I provide in thecasing cover B a series of cutter bars Q mounted on radial faces ofprojections S projecting inward from the cover B. These cutter bars arebeveled on their lateral edges and have holes in which are mounted thehook ends of hook bolts T that pass to the outside of the cover and areprovided with nuts by which the cutter bars are adjusted against fillerstrips U so that the inner edge of each bar is close to the hammercircle, and. the bar may be reversed to bring the other edge intooperative position; As the material is carried by, and thrown outwardagainst As indicated in Fig. 1, this coved form of hammer is adapted topick up and carry these cutter bars by the cove hammers, a furtherreduction occurs.

I claim:

1.'A rotary pivoted hammer com risin shanks s aced apart and provid witholes at t eir inner ends for pivotal mounting, and a cross bar headconnecting the outer ends. of said shanks and curved con- 2. A rotarypivoted hammer comprising a, pair of spaced shanks having holes in theirinner ends for pivotal mounting, and a cross bar head connecting theinner ends of said shanks and concavely curved towards the front andhaving transverse slots, a, similarly curved adjustable plate having abeveled lateral. ed e mounted on saidhead and having bolt oles' matchingsaid slots, bolts passing through said holes and slots to the rear ofsaid head, and nuts.

on said bolts, substantially as shown and described.

3. In a machine of the character described the combination with acasing, cutter. bars radially adjustable in said casing, and means foradjusting said bars radially, of cutters co-acting with said cutter barsand consisting of rotary heads provided with surfaces curvedconcavelyforward into coves adapted to pick up the material beingreduced and carry it lupward and further reduce it on said cutter ars.

In testimony whereof I have afiixed my signature.

MILTON r. WILLIAMS.

pivoted hammers having 7

